Alec Marston, freelance photographer, witnesses an accident at an atomic laboratory. His camera lens is somehow altered and reveals three emissaries of death behind the catastrophe. Marston becomes a tragedy seeker and stages accidents, taking photos of the demons at work. Until the demons who demand he must destroy the camera find a way to get back at him.

An age-old sage lives on a plateau in the Canadian wilderness. One day three prospectors parachute in as visitors looking for uranium. Soon the three men are more interested in the special herbs which grant the sage his longevity. One kills the others and escapes with a sample back to civilization, only to see his plans of eternal life fail brutally.

A tourist couple arrives in the Peruvian village of Vortezo where a Spanish conquistador of the same name reigned with brutal terror. In a brewing thunderstorm Vortezo comes to life and whips the townsfolk into obedience. The brave US tourist Allan exposes Vortezo as a scam, for he is in reality a costumed and power-hungry tourist guide.

A meteor comes down in the desert near Ghost City valley. Some prospectors go searching for it, but discover an alien spaceship. The robot-like visitors raid the small town and take the humans as specimens back to their star. The only survivor, professor Drake, can hide, but no one believes his fantastic tale.